Safety window-lock.



Patented June 6,1911.

E. V. AMATO.

SAFETY WINDOW LOCK.

APPLICATION rum) M11. as, 910.

I N L HM ATTOR/VE Y 8 UNITED STATES PAT NT oFFIoE.

EDWARD V. AMATO, OF NEW YORK,.1\T. Y.

sArE'rY' WINDOW-LOCK.

Specification of LettersPaten-t.

Patented June 6,- 1911.

Applicationfil ed- January 26, 1910; Serial No;- 540 124.

- ventilation.

My device is simple and may be cheaply constructed and easily operated.

More particularly stated, I provide a plate located upon one sash andcarrying a number of pawls, each forming a practically closed loop, andI further provide a locking member having the form of a casing andadapted to be located upon the other sash, and also having means forengaging any one of the pawls; I also provide means for holding the pawlin positive engagement with the casing.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure l is a perspective showing a window having sashes provided withmy improved sash fastener; Fig. 2 is a fragmentary elevation showing thedevice as used upon a window, the sashes of which, however, are indifferent positions from those of Fig. 1; Fig. 3 is a detail section onthe line 33 of Fig. 4, looking in the direction of the arrow, andshowing one of my improved pawls and the lock associated therewith; Fig.4 is a section on the line 4-4 of Fig. 2, looking in the direction ofthe arrow,

' and showing details of'the lock; and Fig. 5

is a perspective of the lock forming a part of the fastener.

At 6 is a window which is provided with movable upper and lower sashes 7and 8.

A plate 9 is secured rigidly upon theupper sash 7 by aid of screws 10,or equivalent fastenings. A number of bearings 11 are mounted upon theplate 9, these bearings being made of sheet metal bent upon itself andprovided with wings 12 which extend through the plate 9 and project inopposite directions. Each bearing 11 supports a pawl 13' which isrh'adejof resilient heavy wire bent mto' a substantially closed loop ofa generally triangular form, as will be understood from Fig. 3;

At 14 is the lock casing having generally the form of a box, a portionof the outer periphery of the same beingjrounded, as indicated by dottedlines in Fig. 4 and by full" lines in Fig. 5, the curvature of theportion ofthe box ust referred to correspondmg to the path of travel ofthe outermost portions of the pawls 13'; That is to say, as each pawl IStIHIIGd within its bearing 11,

the outermost portion of the pawl describes a path which 1s inside ofthe curved outer portion ofthe casing 14'.

The casing 14 is provided with a top portion 15 rigid relatively to itand connected withthis rigid top portion by aid of ajhin'ge 1-8isla lid16. This lid is provided with an opening 17 and may be swung up or down,

as desired. A screw 14 provided with a head 14 is used for securing thelid of the casing in fixed position whenever desired. When the screw isin position, as indicated in Fig. 3, the head 14 engages the lid 16directly, the shank of the screw extending downwardly through the bottomof the casing and into the lower sash 8.

The operation of my device is as follows: The pawl 13 may be folded backagainst the plate 9 and when in this position either or both of thesashes may be moved freely. Any one of the pawls, however, may be swungoutwardly so as to cross the top of the lower sash. This is the case inFig. 1, with the lowermost of the pawls. The lid 16 being raised, theupper and lower sashes may be adjusted relatively to each other so thatthe bottom portion of a pawl may be swung into the casing 14. The lid 16is now closed, the resiliency of the pawl being sufficient to allow forthis. The pawl now extends through the opening 17, as indicated in Fig.4. This beingv done, the sashes can not move toward or from each otherand rattling is thus effectively prevented. This, of course, is assumingthat the pawls fit neatly into the opening 17 and that when the partsare in the position indicated in Fig. 4 there can be but little lostmotion between the casing 14, the lid 16 and the pawl 13 which is inengagement with these members. r

It may sometimes be desirable to raise th lower sash or to lower theupper sash, or to both raise the lower sash and lower the upper sashfrom the normal positions occupied by these sashes. This may be done andthe pawls adjusted accordingly, so as to hold the sashes in thepositions indicated. When the sashes are in their normal positions, asindicated in Fig. 1, the lowermost pawl 13 extends through the casing14, as in dicated in Fig. 4. The operator, by raising the lid 16 fromthe inside, can readily release the sashes from each other, but a personfrom outside of the room being unable to raise the lid 16 can notreadily disengage the sashes.

It is in some instances desirable to fasten the lid 16 down securelyupon the top of the casing, and for this purpose the screw 14?, abovedescribed, is employed. The upper sash being forced into its uppermostposition and the lower sash into its lowermost position, the lowermostpawl 13 is swung into the positon indicated in Fig. 3, the lid 16 beinglowered; and next the screw 14c is inserted. This being done, a personoutside of the window can not readily insert his hand so as to move thepawl 13 and disconnect the two sashes.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

In a window lock, the combination of a .pawl made of a piece ofresilient wire bent upon itself so as to assume a substantiallytriangular form, means for mounting sald pawl upon a sash, a casingmounted upon EDl/VARD V. AMATO.

Witnesses:

WALTON HARRISON, PHILIP D. RoLLHAUs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). G. I

